Biomass in Sequencing Batch Reactors in India M. Asfar, R.Z. Gaur, - - PowerPoint PPT Presentation

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Biomass in Sequencing Batch Reactors in India M. Asfar, R.Z. Gaur, - - PowerPoint PPT Presentation

Jan 09, 2023 520 likes •668 views

Determination of Active Biomass in Sequencing Batch Reactors in India M. Asfar, R.Z. Gaur, S.S. Afsar, A.A. Khan, A.A. Khan, B. Diamantis, B. Lew, A.A. Kazmi Wastewater Treatment by Aerobic Systems High BOD, COD and nutrients removal

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SLIDE 1

Determination of Active Biomass in Sequencing Batch Reactors in India

  • M. Asfar, R.Z. Gaur, S.S. Afsar,

A.A. Khan, A.A. Khan, B. Diamantis, B. Lew, A.A. Kazmi

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SLIDE 2

Wastewater Treatment by Aerobic Systems

 High BOD,

COD and nutrients removal

 >>>>>

Microorganism growth = Excess sludge

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SLIDE 3

Excess Microorganisms

Activated Excess Sludge

 Excess sludge is

wasted (WAS)

  • Slowly

biodegradable

  • rganics/ or limited

BOD

Endogenous respiration Reduction of Volatile Solids

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SLIDE 4

4

 Small communities  Sludge treatment

SBR- Sequencing Batch Reactor

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SLIDE 5

Objective

To assess the active biomass fraction in SBR systems for small communities

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SLIDE 6

Activated Sludge Monitoring

  • Specific Oxygen

Uptake Rate (SOUR)

  • Temperature
  • pH
  • MLSS, MLVSS
  • SVI
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SLIDE 7

OUR Variation with SRT

SBR- Noida (50) SBR- Noida (54)SBR- PunjabASP- Haridwar SBR- Rishikesh 2 4 6 8 10 12 14 16 18 20 40 60 80 100 120 140 SBR- Noida (50) SBR- Noida (54) SBR- Punjab ASP- Haridwar SBR- Rishikesh

SRT (d) OUR (ml/h/g VSS)

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SLIDE 8

0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1

5 10 15 20 25 30

5 10 15 20

Fraction (%)

OUR (mg/L /h)

Time (Min.)

OUR F remaining

Batch Study on OUR and Active Biomass Fraction Decay

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SLIDE 9

y = 2895.e-0.24x R² = 0.971

1 10 100 1000 10000 2 4 6 8 10

MLVSS (mg/L)

Time (days)

100 1000 10000

5 10 15 20 25 30 35

MLVSS(mg/L) Time (days)

Volatile Solids Fraction Decay

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SLIDE 10

20 40 60 80 100

20 40 60 80 100 120 140 160 180

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 BOD Removal (%)

BOD (mg/L)

Time (days)

Influent BOD Effluent BOD BOD removal

Temporal variation of BOD

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SLIDE 11

MLSS and SVI with sludge recycling

50 100 150 200 250 300 350 400 1000 2000 3000 4000 5000 6000 10 20 30 40 50 60 70 80 90 100 110 SVI (mL/g) MLSS (mg/L) Time (days) MLSS SVI

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SLIDE 12
  • The SBR systems can be a good solution for

wastewater treatment for small communities- BOD removal higher than 80%.

  • Sludge treatment (MLVSS) can be achieved in

the SBR system itself:

  • MLVSS reduction and stabilization;
  • Improved SVI
  • However, increase in MLSS (non organic)

Conclusions

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SLIDE 13